Bumping this thread because I had an idea: Why not combine the best of both worlds and if the OEM CCV is working well, why not add a catch can up top, cap the "valve cover return hose" on the CCV, and leave the stock drain, assuming you have the updated dipstick tube.

Take the elbow from the VC hose, route it to the outlet of the catch can (assuming that the catch can will have "filtered" much of the oil mist and condensation out of the return line), and on the inlet side of the can, it would run into an Elbow which would connect to the stock "S-hose" on the M54 CCV, most likely you could cap the port on the intake distribution piece, and leave the smaller return line connected to the distributor.

My idea is coming off JB's recent addition of a ProVent100, I would recommend adding a ProVent in lieu of a catch can if deleting the CCV entirely. But if its working well and you just want to separate any excess moisture or oil mist and have a cleaner return to the crankcase, would this not be a good solution to do so, and have the "best of both worlds"?

I would try to illustrate my thoughts here but RealOEM doesn't let me save diagram pictures on my work comp

EDIT: I just used BavarianE39's photo and tried a crude illustration. The Red "S" illustrates the factory S hose staying in place and working on the stock CCV, only difference is the port on the distributor is capped off (or still used, depending on how you'd want to plumb it) and you run the S-hose/small return line on IM connection to the inlet of the CC, so that some of the oil mist is separated before hitting the CCV itself, make sense or is this truly dumb?

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